build: Remove fusectl from the default file systems in the demo OS.

* build-aux/hydra/demo-os.scm (file-systems): Comment out
  %FUSE-CONTROL-FILE-SYSTEM, since fuse.ko is missing by default in the
  freestanding VM image.
vm: Support initialization of the store DB when the store is shared.

* gnu/system/vm.scm (qemu-image): Rename #:inputs-to-copy to #:inputs,
  and #:initialize-store? to #:register-closures?.  Add #:copy-inputs?.
  Adjust build gexp accordingly.
  (system-qemu-image): Remove #:initialize-store? argument and add
  #:copy-inputs?.
  (system-qemu-image/shared-store): Add #:inputs, #:register-closures?,
  and #:copy-inputs? arguments.
* guix/build/vm.scm (register-closure): New procedure.
  (MS_BIND): New variable.
  (initialize-hard-disk): Rename #:initialize-store? to
  #:register-closures?, #:closures-to-copy to #:closures, and add
  #:copy-closures?.
  Add 'target-directory' and 'target-store' variables.
  Call 'populate-store' only when COPY-CLOSURES?.
  Bind-mount the store to TARGET-STORE when REGISTER-CLOSURES? and not
  COPY-CLOSURES?.  Add call to 'register-closure'.
system: Add (guix build install) module.

* guix/build/vm.scm (install-grub, evaluate-populate-directive,
  reset-timestamps, register-closure): Move to...
* guix/build/install.scm: ... here.  New file.
* Makefile.am (MODULES): Add it.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Add (guix
  build install) to #:modules.
list-runtime-roots: Don't display a backtrace on 2.0.5 when lsof is lacking.

* nix/scripts/list-runtime-roots.in (lsof-roots): Fix typo in 'catch'
  tag.  Add 'parent' variable.  Wrap 'open-pipe*' call in 'catch'.
  Reported by Andreas Enge <andreas@enge.fr>.
authenticate: Add compatibility hack for Guile 2.0.5.

* guix/scripts/authenticate.scm (%default-port-conversion-strategy): New
  variable.  Reported by Andreas Enge <andreas@enge.fr>.
gnu: Add libuv.

* gnu/packages/libevent.scm (libuv): New variable.
guix system: Add 'build' action.

* guix/scripts/system.scm (show-help): Document 'build' action.
  (guix-system): Honor 'build' action.
* doc/guix.texi (Invoking guix system): Add 'build' action.
hydra: Add dummy root file system declaration.

* build-aux/hydra/demo-os.scm (file-systems): Add "/" file system.
linux-initrd: Factorize kernel command-line option parsing.

* guix/build/linux-initrd.scm (find-long-option): New procedure.
  (boot-system): Use it instead of the local 'option'.
store: Add #:store parameter to 'register-path'.

* guix/store.scm (register-path): Add #:store and honor it.
gnu: Add rasqal.

* gnu/packages/rdf.scm (rasqal): New variable.
build: Add --with-libgcrypt-libdir=DIR to support Debian's multi-arch layout.

* configure.ac: Remove 'LIBGCRYPT_PREFIX' and use 'LIBGCRYPT_LIBDIR'
  instead.  Add --with-libgcrypt-libdir=DIR option.
* Makefile.am (AM_DISTCHECK_CONFIGURE_FLAGS): Pass
  '--with-libgcrypt-libdir'.
* config-daemon.ac: Honor $LIBGCRYPT_LIBDIR when computing
  LIBGCRYPT_LIBS.
gnu: rasqal: Propagate input raptor2.

* gnu/packages/rdf.scm (rasqal): Propagate input raptor2 as indicated in
    the pkg-config file.
gnu: Add redland.

* gnu/packages/rdf.scm (redland): New variable.
gnu: soprano: Add input redland.

* gnu/packages/rdf.scm (soprano): Add inputs redland and rasqal, drop raptor2
    (propagated by rasqal).
system: Make /run/current-system at activation time.

* gnu/system.scm (etc-directory): Change default value of #:profile.
  Change contents of SHELLS.  Use /run/current-system/profile/{s,}bin in
  BASHRC.
  (operating-system-boot-script)[%modules]: Add (guix build
  linux-initrd).  Add call to 'activate-current-system' in gexp.
  (operating-system-initrd-file, operating-system-grub.cfg): New
  procedures.
  (operating-system-derivation): Don't build grub.cfg here and remove it
  from the file union.
* gnu/system/vm.scm (qemu-image): Remove #:populate.
  (operating-system-build-gid, operating-system-default-contents):
  Remove.
  (system-qemu-image): Remove call to
  'operating-system-default-contents'.  Use 'operating-system-grub.cfg'
  to get grub.cfg.  Add GRUB.CFG to #:inputs.
  (system-qemu-image/shared-store): Likewise, but don't add GRUB.CFG to
  #:inputs.
  (system-qemu-image/shared-store-script): Pass --system kernel option.
* guix/build/activation.scm (%booted-system, %current-system): New
  variables.
  (boot-time-system, activate-current-system): New procedures.
* guix/build/install.scm (evaluate-populate-directive): Add case
  for ('directory name uid gid mode).
  (directives, populate-root-file-system): New procedures.
* guix/build/vm.scm (initialize-hard-disk): Replace calls to
  'evaluate-populate-directive' by a call to
  'populate-root-file-system'.
* gnu/services/dmd.scm (dmd-configuration-file): Use
  /run/current-system/profile/bin.
* gnu/services/xorg.scm (slim-service): Likewise.
gnu: openmpi: Add memchecker support.

* gnu/packages/mpi.scm (openmpi) [inputs]: Add valgrind.  Unpropagate
  gfortran.  [arguments]: Add configure flags for memchecker.
vm: Avoid resetting timestamps twice.

* guix/build/vm.scm (initialize-hard-disk): Don't call
  'reset-timestamps' when REGISTER-CLOSURES? is true.
* guix/build/install.scm (register-closure): Mention timestamps in
  docstring.
store: Change #:store parameter to #:prefix.

* guix/store.scm (register-path): Change #:store to #:prefix.
guix system: Add 'init' sub-command.

* guix/scripts/system.scm (install): New procedure.
  (guix-system)[parse-option]: Remove check for extraneous arguments.
  [match-pair, option-arguments]: New procedures.
  Use 'option-arguments'.  Honor 'init'.
  (show-help): Document 'init'.
* doc/guix.texi (Invoking guix system): Document 'init'.